... Items: tee, elbow, socket, nipple, bushing, bend, cap, plug, locknut, cross, cross over, coupling, union, flange, and so on2. Thread Standard ... in connected to the pipes with water, oil, air, coal gasetc, ectWelcome your visit and inquiry!adaTEL: +86-311 ... -87036110Fax: +86-311-87873733 galvanized malleable iron pipe fitting---socket with linner plastic